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On the magnetic behavior of BSCCO(2223) Ag tapes

Cimberle, M.R.
Ferdeghini, C.
Giannini, E.
Marrè, D.
Putti, M.
Siri, A.S.
Published in Physica C: Superconductivity and Its Applications. 1995, vol. 251, no. 1-2, p. 61-70
Abstract Pressed and rolled BSCCO(2223) Ag tapes have been widely characterized by SQUID magnetometry with the applied field both parallel and perpendicular to the c-axis. The main results can be summarized as follows: (1) at low temperature (T = 5 K), the anisotropy of the indashplane and out-of-plane current densities Jab/Jc is estimated to be 50; (2) the magnetic response of the tapes indicates that both intergranular (transport) and intragranular contributions to the magnetic moment are present; (3) the samples show a strong degradation; (4) the hysteresis loops show a certain degree of erratic behavior due to frequent jumps; (5) besides this erratic behavior, other anomalies of the hysteresis loops are present: in particular the anomalous field position of the maxima of the magnetization; (6) in bent samples, representing the intragranular magnetization only, all the anomalies disappear and the hysteresis loops are regular; (7) the intergranular magnetization, obtained by subtraction of the magnetic moments measured on the not-bent and bent sample, gives a current density which is irreversible for increasing and decreasing magnetic field, as seen also in transport measurements.
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CIMBERLE, M.R. et al. On the magnetic behavior of BSCCO(2223) Ag tapes. In: Physica C: Superconductivity and Its Applications, 1995, vol. 251, n° 1-2, p. 61-70. doi: 10.1016/0921-4534(95)00371-1 https://archive-ouverte.unige.ch/unige:91283

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